Kill Flow support

Summary:
* Removed Flow compilation step
* Removed all `flow` annotations
* Removed all FlowFixMe's
* Removed flow typings for Flipper
* Left flow transpilation (stripping) in babel, in case there is any external user using Flow in his plugin
* Left `eslint-plugin-flowtype` dependencies, as `eslint-config-fbjs` requires it

Reviewed By: passy

Differential Revision: D24755545

fbshipit-source-id: 9c0a7910657fd1cba88294e041bf2bfdf7b565bf

desktop/app/src/utils/crashReporterUtility.tsx

@@ -5,7 +5,6 @@
  * LICENSE file in the root directory of this source tree.
  *
  * @format
- * @flow
  */
 
 import {DeviceLogEntry} from 'flipper-plugin';